Method of sealing or luting molds.



J. H. DEPPELER.

METHOD OF SEAUNG OR LUTING MOLDS.

APPLICATION FILED SEPT-8.1915.

Patented Jan. 11, 1916.

speei lication.

mold

1 thermic inf azure,

til it a2) non on To all whom it 721m, 6'0 1 lie it known a On ill; citizen of the il nit I fesident of Jersey City, in tlr; 1 ity of Hudson and State of how harejnvented a certain new userul Method of Sealingor of which the iollmx'ingis a hating a,

This invention relates to the method of sealing or l1" 1g lVlS, and

V has for its object to provide an improved method which, ill ltS L I p elerred form, consists in closing the leak ge openings of the mold with one or more strips of suitable material which has been previously treated with a sticky substance, and th u blowing or otherwise toreinsj linely divided material into the mold, which, in tending to escape through the leak: openings, is caught by the sticky substance on the biting material and there by completely seals any minor leakage openinns not completely sialed by the luting SIN),

'l'he luting strips are preterably oi refractory material, such as asbestos, and the sticky substance rbo e referred to is preterably molasses, the asbestos strips being moistened or c atetl with the molasses before they are positioned. The luting strips so treated may be applied to the article to which the mold sections are clamped to prevent leakage between the surfaces of the and the adjacentsurl aces of the article, or they may be positioned between the meeting surfaces of the mold sections themselves. ll hen leakage openings occur between the sort-aces of the mold sections and the articles to which the mold sections are applied and also between the meeting surfaces of the mold sect-ions themselves. the lilting strips are preferably so applied as to close both of leakage o 'venings.

The method is especially valuable in the butt-welding ot' articles, such as the ends of railway rails. One method of welding the ends of railway rails and the like is to apply a mold to the ends of the railway rails J A: I and to pour a amino- :o the mold a i Sllllltbie heat of n n to weld the adjacent ends of together. lt is apparent tl at such a mold mast lit the contour of the ar icle, such as the rail sect-ion, exactly or the tluid metal nonred into the mold will leak out. Go acbonnt 0t ordina Variations in "toe mitts t "NW w l JUL/LL43 3 TO GOLDSCI-IMZDT mi NEW! YORK.

rial must be forced into the leakage opening itsel; and must be uniform and continuous for the entire length of the leakage opening, or the fluid metal will leak out, As it is customary to preheat the mold before the molten metal is poured into the same, the sealing clay has a tendency to crack, due to the fact that itis dried by the heat and, therefore, the metal in the mold will be liberated. F irthermore, the ope 'ator has no means of ascertaining w iether or not the sealing has been properly done. The pres ent method of luting or sealing the molds by means of clay or similar material alto VS considerable space for the fluid metal 0 run out before stri ting the lilting, and thus allows the formation of a in or thin sheet tt' metal adjacent the molded portion, which, of course, is wasteful, and unsightly.

The present improved method or all of the above-noted objections, as

ing strips may be quickly applied aid may be positioned near enough to the interior .welding railway rails and similar articles bear against each other tor a wirlth of one inch or more all, around too bottom and sides of the mold, the luting strips would have to be forcel between the sections or the mold for a. distance of one inch or more before the fluid metal could escape from the mold. When the finely divided tire-clay or other similar material is blown into the mold, and if there are any leakage openings not propsealed by the luting strip, a cloud of dust arising from the mold will indicate to the operator the leali'a e openings are not properl sealed, Such leakage open ing's, llOWQYQHT, will be ant matically scaled, due to the fact that number of particles of this must be done with sticky' substance on the luting strips and the fine particles so caught will seal all of the relatively small lealmge openings whicn.

of leakages near the lutin strips, and then the finely divided material is blown into the interior of the mold under pressure, so

that the particles of the finely divided material, while in suspension in the interior of the mold, will tend to escape through any existing leakage openings.

The accompanying drawing illustrates the application of the method in the weldingoi railway rails, but it will he understood that the invention is not limited to the welding of railway rails, or any other articles, as

the improvcd process will be found valuable for .luting mold sections when the same a re not applied to already existing a rticles.

In the drawing :--l*igure l a perspective view showing the sections of a ,mold applied to the ends of two railway rails, theleakage openings being sealed in accordance with the present invcntirni and the sprue and preheating openings being closed.

preparatory to the introductiim ot' the fi're clay; re 2 is a perspective view showing the two mold sectionsbefore they are ap plied to the rail ends; Fig. 3 is a side elevation showing the rear mold section applied to the'rail ends but the front mold section removed to expose thcluting strips; Fig. 4 is transverse sectional view taken through the center of the two mold sections and showing-the same applied to the rail ends;

and Fig. 5 is a perspective view illustrating the manner oi applying the lnting strips to the rail ends. v

Referring to the drawing, it will be seen that the mold sections, indicated at A and l& are provided with transverse irregular shaped opcnings u, and b, rospcctivi-lly, which when the mold sections are; brought together, l'orm a transverse opening corre spending in shape to-thc contour ol the rail. section. Each mold section is provided with an interior recess 0, which when the mold sections-are applied to the rail ends (3 and I), encircles the sides and bottom of the rail ends and is capable o'l:' forming a sleeve or collar around the ends of the rails when the molten metal is poured. into the mold.

Before the mold sections are applied to the rail ends, oncor more strips olfrefractory material, such as asbestos, are treated 'mold sections are applied.

with molasses and so applied to the rail. ends that all ot the leakage openings of the mold willhc substantially closed by such strips. .In the drawing, four strips of asbestos are used, two strips being shown at 1 in Fig. 5 (.uicircling' the end of one rail and two strips at 2 encircling the end of the opposite rail. A fifth strip is applied. to the bottom part of one-half of the mold as shown at t in Fig. The sticky substance with which the strips are treated causes them to adhere to the rail ends and to the mold, and they are, therefore, held in position until the When the mold sections are positioned and clamped in place, it is obvious that the luting strips intervening between the surfaces of the rails and the adjacent sin-faces of the mold sections will constitute an eliicient lutin". The short strip it will lie between the meeting surfaces of the mold scctionsat the lower portion thereof, as clearly shown in Fig. 3 to prevent leakage of the molten metal from thebottom of the mold between the meeting surfaces of the mold sections shown at 11 and 0, respectively. The free ends of the luting strips pass upwardly between the mectingsurtaces of the mold sections, as best shown in Figs. 1 l and 4, and thereby prevtmtleakage between the upper meeting surfaces and g.

lieforc the lire-ciay or other finely divided materialis forced into the mold, the sprue openings It and J are closed by means of the plugs 5 and (5, respectively. The preheating opening y'niay be closed by a plug 7. One of the plugs, such as the plug (3, has associated therewith, a pipe section 8, through which the lire-clay under pressure may he introduced into the mold. When the lireclay' is so introduced, it is obvious that in attempting, to escape through any of the leakage openings, some ol the same will be caught by the sticky material on the strips,

and thereby cmnpletely scal such leakage openings. The mold and the rail ends are then preheated in thc usual manner through the prchcatln openings y, and all is then in iwlia -;-s.i a'- the welding operation.

may bc.uscd which will'causc the strips or.

the substance to expand when the mold is preheated. For instance, a mixture olt 1110- incense lasses and flour be used, which event the expansion of the strips may be suiiicient to thoroughly seal the joints Without blowin fire-clay or other material into the mold. isle-ad of mixing the flour with the molasses, it may be blown into the mold and used in place of the lire-clay.

Y1: ions other changes may be made in the details of the process as above described, Without departing from the spirit or scope of the invention as defined in the accompanying claims.

What I claim is:

i. The method of luting or sealing molds lo; 1 in welding the ends of railway s and the like, which consists in winding a itrip of refractory material around the of each of the rails before applying the U n. T he method of lilting or sealing mold sections which consists in treating strips of material with a sticky substance and so positioning the strips thus treated before the sections are assembled as to close all e leakage openings which would noroccur after assembling of the mold lions. i. The method luting or sealing the its between mold sections and the articles ish they are applied. which consists in 9, strips of material with a sticky nice and applying the same to the ars before the mold sections are applied. he me hod of losing or sealing molds,

ts in losing the leakage openi Hllt-Blllfil treated with e substance, and hen blowing; finely ed niaierial into the mold, for the purnss described. 1;; if The method lilting or sealing molds,

' h cons sts in closing the leakage openwith strips of material treated with :1 i substance, and then subjecting the :i-" e openings to a pressure medium eonfinely divided in terial.

.ine of lilting or sealing molds,

' sticky substance,

which consists in closing the leakage openings with strips of material tree-ted with e and then blowing fine fireclay into the mold, for the pur ose described.

7. The method of luting or sealing molds, which consists in closing the leakage openings with strips of material treated with e sticky substance, and then subjecting the leakage openings to a pressure inedium'containing finely divided fire-clay.

S. The method or" luting or sealing molds, which consists in closing the leakage openings with strips of-material treated with a sticky substance, closing all of the openings leading to the interior of the mold to render the interior of the mold substantially airtight except for possible leakage openings not completely closed by said strips, and then blowing finely divided material into the interior of the mold, for the purpose dese 'ibed.

9. The method of luting or sealing mold sections which consists in so positioning strips of material before the mold sections are assembled as to close all of the leakage openings which would normally occur after assembling of the mold sections, and treating such strips Wlull a sticky substance and a iinely divided material.

10, The method of luting or sealing molds employed in welding the ends of railway rails and the like, which consists in treating of refractory material with sticky I the i the the strips substance and then Winding a strip of refractory material thus treated around end of each of the beiore applying mold.

Signed at Jersey Hudson and State of blew Jersey t day of August A. D. 1915a Ollil EEP Witnesses 2 Ems. Bnoritns,

FRANK E. OLDEE, 

